4-(6-氨基吡啶-3-基)哌嗪-1-羧酸叔丁酯

8-cyclopentyl-5-methyl-2-methanesulfinyl-7-oxo-7,8-dihydropyrido[2,3-d]pyrimidine-6-carboxylic acid ethyl ester

1-(6-硝基吡啶-3-基)哌嗪

4-(6-硝基-3-吡啶基)-1-哌嗪甲酸叔丁酯

5-溴-2-硝基吡啶